#1B277F#1B277F

#1B277F is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.9% C 0.147 H 269.8°. Best body text is #FFFFFF at 12.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B277F
RGB	rgb(27, 39, 127)
HSL	hsl(233, 65%, 30%)
HSV	hsv(233, 79%, 50%)
CMYK	cmyk(78.7%, 69.3%, 0%, 50.2%)
CIE-LAB	lab(20.89, 28.43, -50.90)
CIE-LCH	lch(20.89, 58.30, 299.19°)
OKLab	oklab(32.95% -0.0005 -0.1473)
OKLCH	oklch(32.95% 0.147 269.8)
XYZ	xyz(5.0070, 3.2158, 20.4314)
Luminance	0.0322 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B277F #7F731B

analogous

#1B597F #1B277F #411B7F

triadic

#1B277F #7F1B27 #277F1B

tetradic

#1B277F #7F1B59 #7F731B #1B7F41

square

#1B277F #7F1B59 #7F731B #1B7F41

split-complementary

#1B277F #7F411B #597F1B

monochromatic

#06081A #10184D #1B277F #2636B1 #3E51D6

Accessibility & contrast

On white

12.78

#1B277F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1B277F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B277F

12.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B277F	#FFFFFF	#000000	##FFFFFF
##1B277F	1.00	12.78	1.64	12.78
#FFFFFF	12.78	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003782

Deuteranopia (green-blind)

#002D7D

Tritanopia (blue-blind)

#003F4F

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b277f;
/* rgb */ color: rgb(27, 39, 127);
/* oklch */ color: oklch(32.9% 0.147 269.8);

Tailwind

colors: {
  custom: {
    50: '#6961a5',
    500: '#1b277f',
    950: '#000000',
  },
}

SCSS

$custom: #1b277f;
$custom-light: #6961a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b277f",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 127
  },
  "hsl": {
    "h": 232.8,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.32945,
    "c": 0.1473,
    "h": 269.8
  },
  "luminance": 0.03216
}

Semantic roles & 50–950 ramp

primary

#1B277F

secondary

#B3A543

accent

#D440E8

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B277F

Body copy rendered with the generated semantic roles for this colour.

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